/**
 * User: Jinqn
 * Date: 14-04-08
 * Time: 下午16:34
 * 上传图片对话框逻辑代码,包括tab: 远程图片/上传图片/在线图片/搜索图片
 */

(function () {

  var uploadFile,
    onlineFile;

  window.onload = function () {
    initTabs();
    initButtons();
  };

  /* 初始化tab标签 */
  function initTabs() {
    var tabs = $G('tabhead').children;
    for (var i = 0; i < tabs.length; i++) {
      domUtils.on(tabs[i], "click", function (e) {
        var target = e.target || e.srcElement;
        setTabFocus(target.getAttribute('data-content-id'));
      });
    }

    setTabFocus('upload');
  }

  /* 初始化tabbody */
  function setTabFocus(id) {
    if (!id) return;
    var i, bodyId, tabs = $G('tabhead').children;
    for (i = 0; i < tabs.length; i++) {
      bodyId = tabs[i].getAttribute('data-content-id')
      if (bodyId == id) {
        domUtils.addClass(tabs[i], 'focus');
        domUtils.addClass($G(bodyId), 'focus');
      } else {
        domUtils.removeClasses(tabs[i], 'focus');
        domUtils.removeClasses($G(bodyId), 'focus');
      }
    }
    switch (id) {
      case 'upload':
        uploadFile = uploadFile || new UploadFile('queueList');
        break;
      case 'online':
        onlineFile = onlineFile || new OnlineFile('fileList');
        break;
    }
  }

  /* 初始化onok事件 */
  function initButtons() {

    dialog.onok = function () {
      var list = [], id, tabs = $G('tabhead').children;
      for (var i = 0; i < tabs.length; i++) {
        if (domUtils.hasClass(tabs[i], 'focus')) {
          id = tabs[i].getAttribute('data-content-id');
          break;
        }
      }

      switch (id) {
        case 'upload':
          list = uploadFile.getInsertList();
          var count = uploadFile.getQueueCount();
          if (count) {
            $('.info', '#queueList').html('<span style="color:red;">' + '还有2个未上传文件'.replace(/[\d]/, count) + '</span>');
            return false;
          }
          break;
        case 'online':
          list = onlineFile.getInsertList();
          break;
      }

      editor.execCommand('insertfile', list);
    };
  }


  /* 上传附件 */
  function UploadFile(target) {
    this.$wrap = target.constructor == String ? $('#' + target) : $(target);
    this.init();
  }

  UploadFile.prototype = {
    init: function () {
      this.fileList = [];
      this.initContainer();
      this.initUploader();
    },
    initContainer: function () {
      this.$queue = this.$wrap.find('.filelist');
    },
    /* 初始化容器 */
    initUploader: function () {
      var _this = this,
        $ = jQuery,    // just in case. Make sure it's not an other libaray.
        $wrap = _this.$wrap,
        // 图片容器
        $queue = $wrap.find('.filelist'),
        // 状态栏，包括进度和控制按钮
        $statusBar = $wrap.find('.statusBar'),
        // 文件总体选择信息。
        $info = $statusBar.find('.info'),
        // 上传按钮
        $upload = $wrap.find('.uploadBtn'),
        // 上传按钮
        $filePickerBtn = $wrap.find('.filePickerBtn'),
        // 上传按钮
        $filePickerBlock = $wrap.find('.filePickerBlock'),
        // 没选择文件之前的内容。
        $placeHolder = $wrap.find('.placeholder'),
        // 总体进度条
        $progress = $statusBar.find('.progress').hide(),
        // 添加的文件数量
        fileCount = 0,
        // 添加的文件总大小
        fileSize = 0,
        // 优化retina, 在retina下这个值是2
        ratio = window.devicePixelRatio || 1,
        // 缩略图大小
        thumbnailWidth = 113 * ratio,
        thumbnailHeight = 113 * ratio,
        // 可能有pedding, ready, uploading, confirm, done.
        state = '',
        // 所有文件的进度信息，key为file id
        percentages = {},
        supportTransition = (function () {
          var s = document.createElement('p').style,
            r = 'transition' in s ||
              'WebkitTransition' in s ||
              'MozTransition' in s ||
              'msTransition' in s ||
              'OTransition' in s;
          s = null;
          return r;
        })(),
        // WebUploader实例
        uploader,
        actionUrl = editor.getActionUrl(editor.getOpt('fileActionName')),
        fileMaxSize = editor.getOpt('fileMaxSize'),
        acceptExtensions = (editor.getOpt('fileAllowFiles') || []).join('').replace(/\./g, ',').replace(/^[,]/, '');
      ;

      if (!WebUploader.Uploader.support()) {
        $('#filePickerReady').after($('<div>').html(lang.errorNotSupport)).hide();
        return;
      } else if (!editor.getOpt('fileActionName')) {
        $('#filePickerReady').after($('<div>').html(lang.errorLoadConfig)).hide();
        return;
      }

      uploader = _this.uploader = WebUploader.create({
        pick: {
          id: '#filePickerReady',
          label: lang.uploadSelectFile
        },
        swf: '../../third-party/webuploader/Uploader.swf',
        server: actionUrl,
        fileVal: editor.getOpt('fileFieldName'),
        duplicate: true,
        fileSingleSizeLimit: fileMaxSize,
        compress: false
      });
      uploader.addButton({
        id: '#filePickerBlock'
      });
      uploader.addButton({
        id: '#filePickerBtn',
        label: lang.uploadAddFile
      });

      setState('pedding');

      // 当有文件添加进来时执行，负责view的创建
      function addFile(file) {
        var $li = $('<li id="' + file.id + '">' +
          '<p class="title">' + file.name + '</p>' +
          '<p class="imgWrap"></p>' +
          '<p class="progress"><span></span></p>' +
          '</li>'),

          $btns = $('<div class="file-panel">' +
            '<span class="cancel">' + lang.uploadDelete + '</span>' +
            '<span class="rotateRight">' + lang.uploadTurnRight + '</span>' +
            '<span class="rotateLeft">' + lang.uploadTurnLeft + '</span></div>').appendTo($li),
          $prgress = $li.find('p.progress span'),
          $wrap = $li.find('p.imgWrap'),
          $info = $('<p class="error"></p>').hide().appendTo($li),

          showError = function (code) {
            switch (code) {
              case 'exceed_size':
                text = lang.errorExceedSize;
                break;
              case 'interrupt':
                text = lang.errorInterrupt;
                break;
              case 'http':
                text = lang.errorHttp;
                break;
              case 'not_allow_type':
                text = lang.errorFileType;
                break;
              default:
                text = lang.errorUploadRetry;
                break;
            }
            $info.text(text).show();
          };

        if (file.getStatus() === 'invalid') {
          showError(file.statusText);
        } else {
          $wrap.text(lang.uploadPreview);
          if ('|png|jpg|jpeg|bmp|gif|'.indexOf('|' + file.ext.toLowerCase() + '|') == -1) {
            $wrap.empty().addClass('notimage').append('<i class="file-preview file-type-' + file.ext.toLowerCase() + '"></i>' +
              '<span class="file-title" title="' + file.name + '">' + file.name + '</span>');
          } else {
            if (browser.ie && browser.version <= 7) {
              $wrap.text(lang.uploadNoPreview);
            } else {
              uploader.makeThumb(file, function (error, src) {
                if (error || !src) {
                  $wrap.text(lang.uploadNoPreview);
                } else {
                  var $img = $('<img src="' + src + '">');
                  $wrap.empty().append($img);
                  $img.on('error', function () {
                    $wrap.text(lang.uploadNoPreview);
                  });
                }
              }, thumbnailWidth, thumbnailHeight);
            }
          }
          percentages[file.id] = [file.size, 0];
          file.rotation = 0;

          /* 检查文件格式 */
          if (!file.ext || acceptExtensions.indexOf(file.ext.toLowerCase()) == -1) {
            showError('not_allow_type');
            uploader.removeFile(file);
          }
        }

        file.on('statuschange', function (cur, prev) {
          if (prev === 'progress') {
            $prgress.hide().width(0);
          } else if (prev === 'queued') {
            $li.off('mouseenter mouseleave');
            $btns.remove();
          }
          // 成功
          if (cur === 'error' || cur === 'invalid') {
            showError(file.statusText);
            percentages[file.id][1] = 1;
          } else if (cur === 'interrupt') {
            showError('interrupt');
          } else if (cur === 'queued') {
            percentages[file.id][1] = 0;
          } else if (cur === 'progress') {
            $info.hide();
            $prgress.css('display', 'block');
          } else if (cur === 'complete') {
          }

          $li.removeClass('state-' + prev).addClass('state-' + cur);
        });

        $li.on('mouseenter', function () {
          $btns.stop().animate({height: 30});
        });
        $li.on('mouseleave', function () {
          $btns.stop().animate({height: 0});
        });

        $btns.on('click', 'span', function () {
          var index = $(this).index(),
            deg;

          switch (index) {
            case 0:
              uploader.removeFile(file);
              return;
            case 1:
              file.rotation += 90;
              break;
            case 2:
              file.rotation -= 90;
              break;
          }

          if (supportTransition) {
            deg = 'rotate(' + file.rotation + 'deg)';
            $wrap.css({
              '-webkit-transform': deg,
              '-mos-transform': deg,
              '-o-transform': deg,
              'transform': deg
            });
          } else {
            $wrap.css('filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + (~~((file.rotation / 90) % 4 + 4) % 4) + ')');
          }

        });

        $li.insertBefore($filePickerBlock);
      }

      // 负责view的销毁
      function removeFile(file) {
        var $li = $('#' + file.id);
        delete percentages[file.id];
        updateTotalProgress();
        $li.off().find('.file-panel').off().end().remove();
      }

      function updateTotalProgress() {
        var loaded = 0,
          total = 0,
          spans = $progress.children(),
          percent;

        $.each(percentages, function (k, v) {
          total += v[0];
          loaded += v[0] * v[1];
        });

        percent = total ? loaded / total : 0;

        spans.eq(0).text(Math.round(percent * 100) + '%');
        spans.eq(1).css('width', Math.round(percent * 100) + '%');
        updateStatus();
      }

      function setState(val, files) {

        if (val != state) {

          var stats = uploader.getStats();

          $upload.removeClass('state-' + state);
          $upload.addClass('state-' + val);

          switch (val) {

            /* 未选择文件 */
            case 'pedding':
              $queue.addClass('element-invisible');
              $statusBar.addClass('element-invisible');
              $placeHolder.removeClass('element-invisible');
              $progress.hide();
              $info.hide();
              uploader.refresh();
              break;

            /* 可以开始上传 */
            case 'ready':
              $placeHolder.addClass('element-invisible');
              $queue.removeClass('element-invisible');
              $statusBar.removeClass('element-invisible');
              $progress.hide();
              $info.show();
              $upload.text(lang.uploadStart);
              uploader.refresh();
              break;

            /* 上传中 */
            case 'uploading':
              $progress.show();
              $info.hide();
              $upload.text(lang.uploadPause);
              break;

            /* 暂停上传 */
            case 'paused':
              $progress.show();
              $info.hide();
              $upload.text(lang.uploadContinue);
              break;

            case 'confirm':
              $progress.show();
              $info.hide();
              $upload.text(lang.uploadStart);

              stats = uploader.getStats();
              if (stats.successNum && !stats.uploadFailNum) {
                setState('finish');
                return;
              }
              break;

            case 'finish':
              $progress.hide();
              $info.show();
              if (stats.uploadFailNum) {
                $upload.text(lang.uploadRetry);
              } else {
                $upload.text(lang.uploadStart);
              }
              break;
          }

          state = val;
          updateStatus();

        }

        if (!_this.getQueueCount()) {
          $upload.addClass('disabled')
        } else {
          $upload.removeClass('disabled')
        }

      }

      function updateStatus() {
        var text = '', stats;

        if (state === 'ready') {
          text = lang.updateStatusReady.replace('_', fileCount).replace('_KB', WebUploader.formatSize(fileSize));
        } else if (state === 'confirm') {
          stats = uploader.getStats();
          if (stats.uploadFailNum) {
            text = lang.updateStatusConfirm.replace('_', stats.successNum).replace('_', stats.successNum);
          }
        } else {
          stats = uploader.getStats();
          text = lang.updateStatusFinish.replace('_', fileCount).replace('_KB', WebUploader.formatSize(fileSize)).replace('_', stats.successNum);

          if (stats.uploadFailNum) {
            text += lang.updateStatusError.replace('_', stats.uploadFailNum);
          }
        }

        $info.html(text);
      }

      uploader.on('fileQueued', function (file) {
        fileCount++;
        fileSize += file.size;

        if (fileCount === 1) {
          $placeHolder.addClass('element-invisible');
          $statusBar.show();
        }

        addFile(file);
      });

      uploader.on('fileDequeued', function (file) {
        fileCount--;
        fileSize -= file.size;

        removeFile(file);
        updateTotalProgress();
      });

      uploader.on('filesQueued', function (file) {
        if (!uploader.isInProgress() && (state == 'pedding' || state == 'finish' || state == 'confirm' || state == 'ready')) {
          setState('ready');
        }
        updateTotalProgress();
      });

      uploader.on('all', function (type, files) {
        switch (type) {
          case 'uploadFinished':
            setState('confirm', files);
            break;
          case 'startUpload':
            /* 添加额外的GET参数 */
            var params = utils.serializeParam(editor.queryCommandValue('serverparam')) || '',
              url = utils.formatUrl(actionUrl + (actionUrl.indexOf('?') == -1 ? '?' : '&') + 'encode=utf-8&' + params);
            uploader.option('server', url);
            setState('uploading', files);
            break;
          case 'stopUpload':
            setState('paused', files);
            break;
        }
      });

      uploader.on('uploadBeforeSend', function (file, data, header) {
        //这里可以通过data对象添加POST参数
        header['X_Requested_With'] = 'XMLHttpRequest';
      });

      uploader.on('uploadProgress', function (file, percentage) {
        var $li = $('#' + file.id),
          $percent = $li.find('.progress span');

        $percent.css('width', percentage * 100 + '%');
        percentages[file.id][1] = percentage;
        updateTotalProgress();
      });

      uploader.on('uploadSuccess', function (file, ret) {
        var $file = $('#' + file.id);
        try {
          var responseText = (ret._raw || ret),
            json = utils.str2json(responseText);
          if (json.state == 'SUCCESS') {
            _this.fileList.push(json);
            $file.append('<span class="success"></span>');
          } else {
            $file.find('.error').text(json.state).show();
          }
        } catch (e) {
          $file.find('.error').text(lang.errorServerUpload).show();
        }
      });

      uploader.on('uploadError', function (file, code) {
      });
      uploader.on('error', function (code, file) {
        if (code == 'Q_TYPE_DENIED' || code == 'F_EXCEED_SIZE') {
          addFile(file);
        }
      });
      uploader.on('uploadComplete', function (file, ret) {
      });

      $upload.on('click', function () {
        if ($(this).hasClass('disabled')) {
          return false;
        }

        if (state === 'ready') {
          uploader.upload();
        } else if (state === 'paused') {
          uploader.upload();
        } else if (state === 'uploading') {
          uploader.stop();
        }
      });

      $upload.addClass('state-' + state);
      updateTotalProgress();
    },
    getQueueCount: function () {
      var file, i, status, readyFile = 0, files = this.uploader.getFiles();
      for (i = 0; file = files[i++];) {
        status = file.getStatus();
        if (status == 'queued' || status == 'uploading' || status == 'progress') readyFile++;
      }
      return readyFile;
    },
    getInsertList: function () {
      var i, link, data, list = [],
        prefix = editor.getOpt('fileUrlPrefix');
      for (i = 0; i < this.fileList.length; i++) {
        data = this.fileList[i];
        link = data.url;
        list.push({
          title: data.original || link.substr(link.lastIndexOf('/') + 1),
          url: prefix + link
        });
      }
      return list;
    }
  };


  /* 在线附件 */
  function OnlineFile(target) {
    this.container = utils.isString(target) ? document.getElementById(target) : target;
    this.init();
  }

  OnlineFile.prototype = {
    init: function () {
      this.initContainer();
      this.initEvents();
      this.initData();
    },
    /* 初始化容器 */
    initContainer: function () {
      this.container.innerHTML = '';
      this.list = document.createElement('ul');
      this.clearFloat = document.createElement('li');

      domUtils.addClass(this.list, 'list');
      domUtils.addClass(this.clearFloat, 'clearFloat');

      this.list.appendChild(this.clearFloat);
      this.container.appendChild(this.list);
    },
    /* 初始化滚动事件,滚动到地步自动拉取数据 */
    initEvents: function () {
      var _this = this;

      /* 滚动拉取图片 */
      domUtils.on($G('fileList'), 'scroll', function (e) {
        var panel = this;
        if (panel.scrollHeight - (panel.offsetHeight + panel.scrollTop) < 10) {
          _this.getFileData();
        }
      });
      /* 选中图片 */
      domUtils.on(this.list, 'click', function (e) {
        var target = e.target || e.srcElement,
          li = target.parentNode;

        if (li.tagName.toLowerCase() == 'li') {
          if (domUtils.hasClass(li, 'selected')) {
            domUtils.removeClasses(li, 'selected');
          } else {
            domUtils.addClass(li, 'selected');
          }
        }
      });
    },
    /* 初始化第一次的数据 */
    initData: function () {

      /* 拉取数据需要使用的值 */
      this.state = 0;
      this.listSize = editor.getOpt('fileManagerListSize');
      this.listIndex = 0;
      this.listEnd = false;

      /* 第一次拉取数据 */
      this.getFileData();
    },
    /* 向后台拉取图片列表数据 */
    getFileData: function () {
      var _this = this;

      if (!_this.listEnd && !this.isLoadingData) {
        this.isLoadingData = true;
        ajax.request(editor.getActionUrl(editor.getOpt('fileManagerActionName')), {
          timeout: 100000,
          data: utils.extend({
            start: this.listIndex,
            size: this.listSize
          }, editor.queryCommandValue('serverparam')),
          method: 'get',
          onsuccess: function (r) {
            try {
              var json = eval('(' + r.responseText + ')');
              if (json.state == 'SUCCESS') {
                _this.pushData(json.list);
                _this.listIndex = parseInt(json.start) + parseInt(json.list.length);
                if (_this.listIndex >= json.total) {
                  _this.listEnd = true;
                }
                _this.isLoadingData = false;
              }
            } catch (e) {
              if (r.responseText.indexOf('ue_separate_ue') != -1) {
                var list = r.responseText.split(r.responseText);
                _this.pushData(list);
                _this.listIndex = parseInt(list.length);
                _this.listEnd = true;
                _this.isLoadingData = false;
              }
            }
          },
          onerror: function () {
            _this.isLoadingData = false;
          }
        });
      }
    },
    /* 添加图片到列表界面上 */
    pushData: function (list) {
      var i, item, img, filetype, preview, icon, _this = this,
        urlPrefix = editor.getOpt('fileManagerUrlPrefix');
      for (i = 0; i < list.length; i++) {
        if (list[i] && list[i].url) {
          item = document.createElement('li');
          icon = document.createElement('span');
          filetype = list[i].url.substr(list[i].url.lastIndexOf('.') + 1);

          if ("png|jpg|jpeg|gif|bmp".indexOf(filetype) != -1) {
            preview = document.createElement('img');
            domUtils.on(preview, 'load', (function (image) {
              return function () {
                _this.scale(image, image.parentNode.offsetWidth, image.parentNode.offsetHeight);
              };
            })(preview));
            preview.width = 113;
            preview.setAttribute('src', urlPrefix + list[i].url + (list[i].url.indexOf('?') == -1 ? '?noCache=' : '&noCache=') + (+new Date()).toString(36));
          } else {
            var ic = document.createElement('i'),
              textSpan = document.createElement('span');
            textSpan.innerHTML = list[i].url.substr(list[i].url.lastIndexOf('/') + 1);
            preview = document.createElement('div');
            preview.appendChild(ic);
            preview.appendChild(textSpan);
            domUtils.addClass(preview, 'file-wrapper');
            domUtils.addClass(textSpan, 'file-title');
            domUtils.addClass(ic, 'file-type-' + filetype);
            domUtils.addClass(ic, 'file-preview');
          }
          domUtils.addClass(icon, 'icon');
          item.setAttribute('data-url', urlPrefix + list[i].url);
          if (list[i].original) {
            item.setAttribute('data-title', list[i].original);
          }

          item.appendChild(preview);
          item.appendChild(icon);
          this.list.insertBefore(item, this.clearFloat);
        }
      }
    },
    /* 改变图片大小 */
    scale: function (img, w, h, type) {
      var ow = img.width,
        oh = img.height;

      if (type == 'justify') {
        if (ow >= oh) {
          img.width = w;
          img.height = h * oh / ow;
          img.style.marginLeft = '-' + parseInt((img.width - w) / 2) + 'px';
        } else {
          img.width = w * ow / oh;
          img.height = h;
          img.style.marginTop = '-' + parseInt((img.height - h) / 2) + 'px';
        }
      } else {
        if (ow >= oh) {
          img.width = w * ow / oh;
          img.height = h;
          img.style.marginLeft = '-' + parseInt((img.width - w) / 2) + 'px';
        } else {
          img.width = w;
          img.height = h * oh / ow;
          img.style.marginTop = '-' + parseInt((img.height - h) / 2) + 'px';
        }
      }
    },
    getInsertList: function () {
      var i, lis = this.list.children, list = [];
      for (i = 0; i < lis.length; i++) {
        if (domUtils.hasClass(lis[i], 'selected')) {
          var url = lis[i].getAttribute('data-url');
          var title = lis[i].getAttribute('data-title') || url.substr(url.lastIndexOf('/') + 1);
          list.push({
            title: title,
            url: url
          });
        }
      }
      return list;
    }
  };


})();
